Nyx, goddess of the Night. Nyx stood at or near the beginning of creation, and was the mother of personified gods such as Hypnos (sleep) and Thánatos (death). She is found in the shadows of the world and only ever seen in glimpses.
Trying to fill in someone else's shoes is futile. The person will at best be a shadow of the one who shoes they are trying to fill. It is best to have new shoes (their own) rather than live in the shadow of another